Assemblies based on the directing effect of non-classical W(18) anionic clusters and the rod-like trans-1,2-di-(4-pyridyl)-ethylen (bpe)

作者：Han Zhangang^*; Wang Yanna; Song Xuejun; Huang Jiao; Zhai Xueliang

来源：Journal of Solid State Chemistry, 2011, 184(3): 690-697.

DOI：10.1016/j.jssc.2011.01.041

• Supramolecular assembly
• Polyoxometalate
• Conjugated system
• Hydrogen bond
• pi-stacking

Two polyoxometalate (POM) supramolecular assemblies based on Wig clusters and the rigid organic trans-1,2-di-(4-pyridyl)-ethylen (bpe) have been synthesized and fully characterized, namely (H(2)bpe)3 center dot 5H(2)[SbW(18)O(60)]center dot 5H(2)O (1), and (H(2)bpe)5[Ni(4)(AsW(9)O(34))(2)(H(2)O)(2)]center dot 3H2O (2). Compounds 1-2 are formed from organic bpe cations and different polytungstate anions: pseudo-Dawson-type [SbW(18)O(60)](9-) in 1 and sandwich-type [Ni(4)(H(2)O)(2)(AsW(9)O(34))(2)](10-) in 2. Both of compounds 1-2 crystallize in a low-symmetrical space group of P-1 and consist of a complicated supramolecular network based on non-covalent intermolecular weak interactions, including hydrogen bonding and pi center dot center dot center dot pi stacking. The multipoint hydrogen bonding interactions constitute the structural feature in two supramolecular frameworks. The UV-vis, fluorescence and electrochemistry properties are also studied.

• 出版日期2011-3
• 单位河北师范大学